The US government has devoted a lot of resources to sealing the US-Mexican border. How effective has the build-up been, and what is the best way to measure it? Marco Werman speaks with Edward Alden, a senior fellow at the Council on Foreign Relations.

Undocumented immigrants brought to the United States by their parents before the age of 16 are about to get a reprieve from the threat of deportation that's long hung over their heads. The Obama administration announced a new proposal to suspend deportations of specific immigrants and grant them work authorization.

The US government has devoted a lot of resources to sealing the US-Mexican border. How effective has the build-up been, and what is the best way to measure it? Marco Werman speaks with Edward Alden, a senior fellow at the Council on Foreign Relations.

Undocumented immigrants brought to the United States by their parents before the age of 16 are about to get a reprieve from the threat of deportation that's long hung over their heads. The Obama administration announced a new proposal to suspend deportations of specific immigrants and grant them work authorization.

The US government has devoted a lot of resources to sealing the US-Mexican border. How effective has the build-up been, and what is the best way to measure it? Marco Werman speaks with Edward Alden, a senior fellow at the Council on Foreign Relations.

Undocumented immigrants brought to the United States by their parents before the age of 16 are about to get a reprieve from the threat of deportation that's long hung over their heads. The Obama administration announced a new proposal to suspend deportations of specific immigrants and grant them work authorization.